Pvc switching control method for atm network


PROBLEM TO BE SOLVED: To provide a PVC(Permanent Virtual Connection) control method which is capable of switching a PVC connection at a high speed in the case of occurrence/restoration of a fault, is excellent in reliability and maintainability, and can be easily controlled in an ATM(Asynchronous Transfer Mode) communication network. SOLUTION: A master PVC connection and an OAM(Operation Administration and Maintenance) connection are established between two ATM exchanges, and a detour PVC connection and a detour OAM connection which are previously prepared for a detour are also established. If the occurrence/restoration of a fault is recognized by an OAM function, an operation PVC connection is switched between the master PVC connection and the detour PVC connection.
(57)【要約】 【課題】 ATM通信網において、障害発生/復旧時の PVCコネクションの切替を高速化することができ、信 頼性および保守性に優れ、かつ制御が簡単なPVC切替 制御方法を提供する。 【解決手段】 2つのATM交換機間にマスタPVCコ ネクションおよびOAMコネクションを設定するととも に、迂回用に予め準備された迂回用PVCコネクション およびOAMのコネクションを設定しておき、OAM機 能によりマスタPVCコネクションの障害発生/復旧を 認識すると、マスタPVCコネクションと迂回用PVC コネクションとの間で運用PVCコネクションを切り替 える。




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